A mystical water and land creature, much like a siren who sits on a rock in the Rhine river in Germany and lures sailors to their death with her song. She sings, they steer their boats to her unaware of the sharp rocks underwater, they crash and perish.

Also appears more recently in many songs, including by The Pogues on the album Peace and Love a song by Styx on the album Equinox and a poem by Sylvia Path.